Karatsu Weather and Climate: A Comprehensive Guide
The temperature in Karatsu can vary greatly throughout the year.
The temperatures shift from very warm
to cold.
It is also known for its large amounts of rainfall.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from very warm to chilly in Karatsu. Typically, average maximum daytime temperatures range from a very warm 31°C in August to a chilly 11°C in the coolest month, January.
Nights are cooler, with lows often dropping to around 5°C during the colder months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Karatsu has a relatively rainy climate with high precipitation levels, averaging 1825 mm of rainfall annually. The climate in Karatsu shows significant variation throughout the year. Expect heavy rainfall in June, with an average of 306 mm of precipitation over 18 rainy days. In contrast, January offers drier and sunnier days, with around 82 mm of rainfall over 19 rainy days. For more details, please visit our Karatsu Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
For those who appreciate different seasons, Karatsu serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.8 hours of sunshine daily, and embrace the darker days in January, offering only 3.4 hours of daily sunlight. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is high throughout the year in Karatsu.
The city experiences its highest humidity in July, reaching 76%. In January, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and chance of sleet overcast and no rain broken clouds and small chance of slight rainForecast for Karatsu
4 m/s
5 m/s
4 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Karatsu in Japan
During the months of May, June and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
Most rainfall (rainy season) is seen in June, July, August and September.
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 11°C.
June tops the wettest month list with 306 mm of rainfall.
January is the driest month with 82 mm of precipitation.
May is the sunniest month with an average of 205 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
